Plus/Minus
The point difference, points scored minus points allowed, while a player is on the floor, in a game or across a season.
What Plus/Minus measures
Plus/Minus is the oldest attempt to measure a player's whole effect beyond his own stats. While he shoots, rebounds and passes, his team is scoring and conceding, and Plus/Minus watches the scoreboard the whole time he is out there. A player on the floor while his team outscores opponents all season is, at the very least, present for a lot of winning. It is a blunt tool, but it measures something real: the result.
How Plus/Minus is calculated
+/- = Team points scored − team points allowed, while the player is on the floor
The catch
Raw Plus/Minus is mostly about teammates and opponents
A player who only plays next to the best lineup piles up a positive number whatever he adds. A player who closes games on a bad team piles up a negative one even when he plays well. Raw plus-minus is a start, not a conclusion. On/Off and adjusted models exist to correct for it.
Blowouts distort the season total
Win by 30 and the starters bank a huge positive number, much of it against garbage-time lineups. Lose by 25 and they bank a big negative one for a game that was over by halftime. Season totals lean on how often a team wins or loses by a lot, not just whether it wins.
Seen in a game
At the team level Plus/Minus is clean: Olympiacos outscored opponents by +10.8 per 100 possessions in 2025–26 and turned it straight into a 30-12 record, while ASVEL (-9.7) went 8-30. For one player it is much noisier. A role player who only shares the floor with stars posts a glowing number almost by default, and a star stuck on a weak roster can post a poor one while playing well. That is why the serious versions of this idea, On/Off and adjusted plus-minus, try to strip out the help around him. Raw Plus/Minus is a starting point for a question, not the answer.
Common questions
- What is plus-minus in basketball?
Plus-minus is the point difference while a player is on the floor — the team's points scored minus points allowed during his minutes. It measures what happened with him out there, teammates included.
- How is plus-minus calculated?
Add the points the team scores and subtract the points it allows while the player is on court. If the team outscores opponents by 9 over his minutes, his plus-minus is +9.
- Is plus-minus a reliable stat for one game?
Not really. In a single game it swings on teammates, matchups and luck. It becomes meaningful over a full season, and is more trustworthy when paired with on/off and box plus-minus.
